Like jrrdw said, a chamber fan and metering system is more important than a new spark system. Metering can be done with a syringe, and only costs a buck or two. (search the forum for how to do it.) Not as much bling as a pipe + regulator based setup but just as accurate and a heck of a lot cheaper....

Stun guns work really nice for ignition. You can shop at our sponsors Launchpotatoes.com or Ultimatespudgun.com. They will have different ignitions to choose from. Think about getting a chamber fan and metering system. That would be pretty cool but I don't think canadian customs would appreciate me...

Success!!! Just gave it a 1/2 second twist on the torch and POOF. After so many failed ignitions I forgot to aim the barrel somewhere safe and took out a can of pipe glue on the shelf. I'm using a small propane torch with the trigger type igniter, which gives a weak spark. I will be browsing the for...

Built my first propane cannon, no boom. Made a bigger ignition chamber thinking it needed more air. Still no boom. Put a few items in to mix the fuel/air around a bit, no boom. Lights fine when the barrel is unloaded, but as soon as I load ammo, no boom... Tips?